关于前后端分离跨域

关于前后端分离跨域

1.在spring里有对跨域的支持，我们只要在配置里加上这一个配置即可

<mvc:cors>
        <mvc:mapping path="/**" allowed-origins="https://pandabox.io"
            allow-credentials="true" max-age="3600" allowed-methods="GET,POST,OPTIONS"
            allowed-headers="Origin, X-Requested-With, Content-Type, Accept" />
</mvc:cors>

2.光有这一个配置貌似还不够哦，还需要加一个为项目加一个过滤器，如下

package com.linktai.utils;
​
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
​
/**
 * Servlet Filter implementation class CrossFilter
 */
public class CrossFilter implements Filter {
​
    /**
     * Default constructor. 
     */
    public CrossFilter() {
        // TODO Auto-generated constructor stub
    }
​
    /**
     * @see Filter#destroy()
     */
    public void destroy() {
        // TODO Auto-generated method stub
    }
​
    /**
     * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
     */
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        response.setHeader("Access-Control-Allow-Origin", "https://pandabox.io");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE"); 
        response.setHeader("Access-Control-Max-Age", "3600");  
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");  
        response.setHeader("Access-Control-Allow-Credentials", "true");  
        chain.doFilter(req, resp);
    }
​
    /**
     * @see Filter#init(FilterConfig)
     */
    public void init(FilterConfig fConfig) throws ServletException {
        // TODO Auto-generated method stub
    }
​
}
​